Electric lighting device



y H. A. DOUGLAS 2,117,757

ELECTRIC LIGHTING DEVICE Filed March 28, 1936 2 Sheets-Sheet 1 24 18 u, fiszqt a YZWM wm w 27 1b ATTORNEYS y 1933- H. A. DOUGLAS 2,117,757

ELECTRIC LIGHTING DEVICE Filed March 28, 1936 2 Sheets-Sheet 2 Hans A'D'oggias I NVENTOR AT TO RN 2 5 Patented May 17,

UNITED sTATEs U n morale uenr'mc nEvicE Douglas, Bromn, Mlcln, asslgnor to Kingston Products Corporation, a corporation oilndiana -Application March 28', 1936, Serial No. 71,439

2 Claims.

My invention relates to electric lighting devices, and more particularly to electric lamp units comprising an incandescent electric mounted in a reflector, as for example, in an automobile headlight, and the principal object of my invention is to provide a new and improved lighting device and unit of this type.

In the drawings accompanying this specification, and forming a part of this application, I have shown for purposes of illustration, several forms which my invention may assume. In these drawings:

Figure 1 is a vertical sectional view, certain parts being fragmentarily shown, of one embodiment of my invention,

Figure 2 is a perspective rear view of a mounting or reflector, fragmentarily shown, which is elevations of a contact carrier, forming part of I used in the embodiment of Figure 1,

Figure 3 is a fragmentary front view of the mounting or reflector used in the embodiment of Figure 1,

Figures 4 and 5 are respectively front and side Figure 8 is a fragmentary sectional view taken on the line V11I-V1II of Figure '1, looking in the direction of the arrows, 3

Figures 9 and 10 are vertical sectional views of other embodiments of my invention,

Figure 11 is a perspective rear view of another embodiment of a mounting or reflector, such as may be used, for example, in the embodiment of Figure 10, r i

Figure 12 is a front elevation of the reflector shown in Figure 11,

Figures 13 and 14 are front elevations of contact carriers embodied in Figures 9 and i respectively.

Figure 15 is a transverse sectional front view of- XVI of Figure 10, looking in the direction oi the arrows, vl'telerrihgtol'igure1,theeniliodi nentoimy invention here illustrated is shown as including an incandescent dectric lamp ll, adapted to bc lamp I (Cl. 240-4l) suitably connected to amounting ii, the mounting being in this instance a reflector'fragmentarily shown. The lamp is provided with a base 12, which in this instance includes laterally extending positioning means It. The base includes a shell I, and the laterally extending portion of the base comprises a collar i5 surrounding the shell I4, and a radially extending flange ii on the collar ii. The collar i5 maysbe fastened to the shell in any suitable mar ner, as by solder is (see Figures 6 and 7). As may be seen best in Figure 6, the flange ll comprises a portion l9 having a generally circular outline, and extending radially outwardly from that portion there are a plurality, desirably three, sectoral projections 20, 2| 22, the peripheries of which deflne a v circle. The upper projections, Iii, 2i, as viewed in Figure 6, have-their radial axes of symmetry A0, B0 spaced less than 120: apart. V The peripheral arcs of the sectoral projections 2|, ii are here shown as equal to each other. The lower sectoral projection 22, as viewed in Figure 6, is here shown as so disposed, and so proportioned, with respect to the upper sectoral projections 20, 2|, that the line CO, bisecting the angle AOB, does not coincide with the radial axis of symmetry of the lower sectoral projection, 22. As here shown the lower sectoral projection has aleit hand radial margin 23-which is spaced clockwise from the line CO an amount such that the intercepted peripheral are is equal to one half of the peripheral arc of one of the sectoral projections 2|, 2i; and a right hand margin 24 which is spaced counter clockwise from the line CO an amount such that the intercepted peripheral arc is substantially greater than one half of the peripheral arc of one of the sectoral projections 20, II.

The lamp flange i1 is provided with, desirably three, axially frontwardly extending projections 25 convenimtly formed by making depressions 4o 28 in the rear face of the flange. By the term front is meant that side of a part presented toward the light producing source of the lamp II, and by rear the opposite side of the part. The

projections 28 are concentrically disposed on the r sectoral projections 2|, 2i, 2!. ,Each projection It is here shown as displaced from the lines A0, B0, and CO, the same amount in a counter clockwise direction.'

The lamp flange il may be further provided, on one of the sectoral projections, with a frontwardly extending lug 21, which is here shown .ubeingiormedbystsikingupmetalmitoithe sectoral projection i2. 4

The reflector ii is here shown as provided so wth a frontwardly extending cylindrical pocket 28 which, in this instance, is fragmentary in character. The pocket 28 has a plane bottom or end flange 29 and a cylindrical portion i6, both of which are fragmentary in character. The end flange 29 has a central aperture 38 slightly larger than the diameter of the portion l9 of the lamp flangel'l. The end flange 29 is fragmentarily cut away to form radially extending recesses 3|, 32, 33. These recesses leave the end flange 29 in the form of three flat segmental end flanges 34, 35, 36, the rear surfaces of which, at least, define a single plane.

The recesses 3| 32, 33 extend into the cylindrical portion i6 of the pocket 28, leaving three fragmentary cylindrical portions'31, 38, 39. The recess 32 is complementary to one of the sectoral projections 2|], 2|, and so proportioned that one of these projections may pass axially therethrough. The recesses 3|, 33 are of a shape analogous to the recess 32 but are considerably wider circumferentially.

Extending rearwardly from the reflector between the fragmentary cylindrical portions 31. 38, 39 are three arcuate ears 40, 4|, 42, the inner peripheries of which are defined by the same cylinder that defines the inner periphery of the cylindrical portion i6 of the reflector pocket. The ears 40, 4|, 42 may have rearwardly tapering margins.

The end flanges 34, 35, 36 of the reflector pocket, as may be seen particularly in Figure 3, are here shown as of equal circumferential extent, but the radial axes of symmetry of the upper flanges, 34, 35, as viewed in Figure 3, are less than 120 apart. The radial axis of symmetry of the lower end flange, 36, is on a line bisecting the angle between the radial axes of symmetry of the upper flanges 34, 35. The circumferential extent of each of the end flanges 34, 35, 36 is the same as that of one of the sectoral flanges 20, 2| on the lamp flange l1, and consequently, when the lamp is in the position of 'Figures 1 and '1, the upper sectoral flanges, 20,

2| will be in registry with the end flanges 34, 35, whereas the lower sectoral flange 22 of the lamp will have its margin 23 in registry with the left hand margin of the end flange 36, but the right hand margin 24 of the sectoral projection 22 will be spaced counter clockwise from the right hand margin of the end flange 36. The inner cylindrical periphery of the pocket 28 (that is, the

4 cylindrical surface defined by the inner peripheral surfaces of the portions 31, 38, 39) is of such diameter that the peripheral margins of the sectoral projections 20, 2|, 22 on the lamp flange will be gaged thereby, that is, snugly flt in the pocket, when the axial projections 25 on the lamp flange H are in engagement with the rear surfaces of the end flanges 34, 35, 36 of the pocket 28.

When the lamp ID is in the position shown in Figures 1 and 7, the lug 21 on the lamp flange 22 is freely, but desirably snugly, positioned in a recess or aperture 43 in the end flange 36 of the pocket 28. The circumferential extent of the aperture 43 is desirably very little greater than the thickness of the lug 21, so that the interengagement of the lug and aperture will accurately position the lamp l0 rotatively with respect to the reflector ll. v

The lamp in may be held with the axial extensions 25 on the lamp flange in abutment with the end flanges 34, 35, 36, by means here shown as a contact carrier 44.

The contact carrier 44 comprises a cylindrical shell 45 provided-at its front end with a hollow generally cylindrical enlargement 53, joined to the shell 45 by an integral radial flange 46. The cylindrical enlargement 53 is here shown as fragmentarily cut away to form three segmental prongs 41, 48, 49. The diameter of the cylinder defined by the outer peripheral surfaces of the prongs", 48, 49 is such as to flt within the cylinder defined by the inner peripheral surfaces of the cars 48, 4|, 42. The prongs 41, 48, 49 have their radial planes of symmetry unequallyspaced, as may be seen in Figure 4, to correspond with the radial planes of symmetry of the cars 40, 4|, 42 of the reflector; and the circumferential widths of the prongs 41, 48, 49 correspond generally to the circumferential widths of the respective cars 49, 4|, 42. Here shown as extending radially outwardly from the circumferential centers of the prongs 41, 48, 49 are three projections 50, conveniently formed by locally indenting the inner peripheries of the prongs, to form depressions, such as the depression 5| shown in Figure 1.

The cars 40, 4 42 are provided with recesses or apertures 52, suitably spaced from the free ends of the ears, and disposed complementarily with respect to the projections 56, so that the projections and apertures are adapted to interengage, as indicated in Figure 1, to hold the contact carrier 44 detachably assembled with the reflector The cars 40, 4|, 42 are further provided with recesses 54, extending axially rearwardly from near the apertures 52 and flaring radially outwardly in an axial direction toward the free ends of the ears.

The contact carrier 44 also includes an insulating member 55, having an outside diameter approximately the same as the inside diameter oi the shell 45, adapted to abut diametrically opposite segmental flanges 56 extending radially inwardly from the rear end of the shell 45. The insulating. member is further provided with a plurality of circumferentially spaced radial projections, in this instance three, two of which, 51, 56, may be seen in Figure 5, and the third of which, 59,15 located at the other side of the member 55, analogously to the projection 51. On opposite circumferential sides of the projection 58 are disposed two rearwardly extending projections 60, 6| on the shell 45. Immediately below the projections 51, 59, as viewed in Figure 5, the shell 45.is provided with the respective rearward projections 82, 63. The space between the projections 62,63 is less than between the projections 60, 6|. The projections 51, 58, 59, and the projections 68, 6|, 62, 63 may be arranged in any other suitable manner, or any other suitable means may be adopted so that the insulating member 55 and the shell 45 may be assembled in but one relative rotative relation. In order to hold the insulating member 55 assembled with the shell 45 a desirable number of axially extending fingers 64 may be provided at the rear ends 01' the projections 68, 6|, 62,53, the fingers 64 being clinched radially inwardly over the rear face oi! the insulating member 55.

we insulating member 55 is adapted to carry contacts 65, 66, these contacts being desirably formed as enlarged heads on shanks fitted over and swedged to the ends of conductors 61, 68. The conductors 61, 68 are disposed in sleeves 69, each sleeve being slidable within a bushing 10, which is fixedly mounted in any suitable manner, as by beading, through the insulating member 55. Each sleeve 69 is surrounded by a spring 1|, between the bushing 18 of the sleeve 69 and a jections have been brought into contact with flange 12, on each sleeve, abutting the respective contacts.

In' the position shown in Figure l, the contacts 35, 38 of the contact carrier make contact respectively with contacts", 14 provided on the lamp base |2. One of these lamp contacts 13, is not visible, being directly behind the contact 14 visible in Figure l. The provision of a plurality of contacts 13, 14 on the lamp base enables the use of a multiple filament lamp, the lamp being shown here as provided with two filaments, one of which, 15, may desirably have its lighting center at some predetermined point with respect to the reflector, as for example at the focus, andthe other of which, 16, may be displaced from the'fllament 15, and may be used for providing dim light or so-called tilted light. The fllaments 15, 16 have their terminals connected in a well known manner to the lamp base l2 and to the contacts 13, 14 on the lamp base. The passage of current to either one or both of the fllaments 15, 16, may becontrolled in any suitable manner,

. by switching means (not shown) interposed in the conductors "31, 33'. 1

It will be evident that in assembling the-contact carrier 44 with the reflector l, the enlargement 53 will be first brought into axial alinement with the axis of the cylinder deflned by the ears 40, 4|, 42 on the reflector, and the rotative It will be evident, since the pins 33 and the apertures 52 are unequally circumferentially spaced, thatthe contact carrier 44 may be assembled with the reflector II in but one relative rotative relation, and consequently the pair of contacts 33, 36, carried by the contact carrier 44 assumes a predetermined rotative relation with respect to the reflector.

When it is desiredto assemble the lamp I. with the reflector I, the lamp is flrst brought-to a po- 0 sitlon, at the front of the reflector, so that the portion I! of the lamp flanges is concentric with the aperture 3ll and the narrower sectoral projections 20, 2| of the lamp flange straddle the end flange 34. when the lamp Ill is-in this position with respect to the reflector II, the sectoral projection 22 has its left hand margin, 23, disslightly to the right of the right hand margin of the end flange. The sectoral projections 23, 2|, 22 are then in a'position to pass freely through the recesses 3|, 32, 33 respectiveiy. The lamp I! may be then moved axially,

- rearwardly, against thebias of the springs 1|,

and it is so moved far enough so that the lug 21 will clear the end flange 33, whereupon the lamp is rotated in a clockwise direction, and at the same time may be permitted to move bodily frontwardly under the bias of the springs 1|. This causes the narrower sectoral projections, 20, 2|, to abut the rear faces of the end flanges 34, 35, and the end of the lug 21 to, abut the rear face of the end flange 36. Further rotation of the lamp III, in a clockwise direction will bring the lamp to the position shown in Figure 7 wherein the'lug 21 has snapped into the aperture 43 in .the end flange 36. Meanwhile, the axialpro- .the parts are assembled, as in Figure 1.

the rear faces of the end flanges 34, 35, 36, thereby definitely positioning the plane of the lamp flange "with respect to the end flanges 34, 35, 38 of the pocket.

It will be evident that since the lamp flange I1 is accurately pre-positioned with respect to its distance from the filaments II, 16, and the direction of the plane of the flange I1 is pre-positioned with respect to the axis of the lamp l0, and the lug 21 positions the lamp rotationally, the fllaments 15, 16 will assume the desired predetermined position with respect to the reflector when Also, it will be noted that due to the construction and relationship as between the end flanges 34, 35, 36 of the reflector pocket and the sectoral projections 20, 2|, 22, of the lamp flange, it is possible to insert the lamp flange l1, as hereinbefore' described, from but one relative rotative relation with respect to the reflector I I. In this connection it will be apparent that if it is attempted to insert the lamp flange with the narrower sectoral projections 20, 2|, straddling either the end flange 35 or the end flange 36, the shape and position of the wider sectoral projection, 22, will prevent insertion.

The lamp ||I may be assembled with the posi tioning means l3 by placing the positioning means on a standard with the shell l4 within the collar l5 and then adjusting the lamp until the lighting center of the desired filament thereof is in a: predetermined position, whereupon the collar II is soldered to the shell l4. The position of the other filaments of the lamp may be simultaneously predetermined.

, When it is desired to remove the lamp Whom the reflector II, it will bobvious that it is necessary to flrst move the lamp rearwardly, so that the lug 21 will become disengaged from the aperture 43, whereupon the lamp may be rotated in a counter clockwise direction, until the narrower sectoral projections 20, 2|, again straddle the end flange 34, whereupon the lamp may be removed.

Referring now to the embodiment shown in Figure 9, a lamp Illa, is held in a pocket 23a of the reflector Ila by a contact carrier 44a. The contact carrier 4411 has an enlargement 53a which,

as may be seenbest in Figure '13} includes three prongs 41a, 48a, 48a. These prongs fit outside of three rearwardly extending ears on the reflector, two of which 40a, 4|a are visible in Figure 9, and all of which are respectively similar to the ears 44, 4|, 42, of the embodiment of Figures 1 through 8. The prongs 41a, 40a, 48a

further provided with recesses 54a, extending axially rearwardly from near the apertures 52a, and flaring radially inwardly in an axial direction toward the free ends of the ears. The embodiment of Figure 9 is here shown as otherwise the same as the embodiment of Figure 1.

In the embodiment of Figure 10, a lamp lob is held in a pocket 28b of a reflector lib by a contact carrier 44b. The contact carrier has an enlargement 53b which, as may be seen best in Figure 14, is completely cylindrical and is adapted to flt outside of the reflector ears 40b, 4"), 42b. The enlargement is provided with radially inwardly extending pins 50b, adapted to be seated in apertures 52b in the reflector ears. These ears are further provided with recesses 541) similar to the recesses 54a.

The reflector may have end flanges of its pocket equally spaced, as for example the end flanges 34b, 35b, 36b of the reflector Hb, instead of unequally spaced as in the case of the reflector shown in Figure 3. Also, the lamp flange may have its sectoral projections equally spaced, and of equal width, as for example the sectoral projections 20b, Zlb, 22b, of the lamp flange I'Ib.

In that case all of the sectoral projections 20b, 21b, 221) will register completely with the end flanges 34, 35, 36, as shown in Figure 16. The sectoral projections 20b, 2lb, 22b may then of course be passed through the recesses 3"), 32b, 33b in any one of three relative rotative relations, but the lug 21b will serve to properly locate the relative rotative position of the lamp lb and the reflector llb. The embodiment of Figure 10 is here shown as otherwise the same as the embodiment of Figure 1. While the contact carrier 44b is shown as having the pins 501) circumferentially equally spaced, it will be evident that these pins may be unequally spaced to correspond to and for cooperation with the unequally spaced recesses 54a and apertures 52a, of the reflector Ila. Moreover, while the ears 40b, lib, 42b, of the reflector llb are circumferentially equally spaced as are also the apertures 52b, this is not necessary since a contact carrier, such as a, or one such as b, but with unequally spaced pins 50b may be made cooperable with the reflector llb having correspondingly unequally spaced apertures 52b. Other variations will readily suggest themselves. From the foregoing it will be apparent to those skilled in the art that the illustrated embodiments of my invention provide new and improved electric lighting devices and units, readily and conveniently constructed and assembled, and accordingly, each accomplishes the principal object of my invention. On the other hand, it also will be obvious to those skilled in the art that the illustrated embodiments of my invention may be variously changed and modified, or features thereof, singly or collectively, embodied in other combinations than those illustrated, without departing from the spirit of my invention, or sacrificing all of the advantages thereof,

and that accordingly, the disclosure herein is illustrative only, and my invention is not limited thereto.

I claim:.

1. In combination: a mounting having an aperture and having a plurality of circumferentially spaced recesses extending outwardly from said aperture; an incandescent electric lamp provided with a base; said base being disposed in said aperture and having a lateral extension constructed and arranged to abut said mounting at one side thereof; said mounting having integral circumierentially spaced projections extending laterally from'said mounting at said side thereof and disposed around said aperture at the ends of said recesses; pressing means constructed and arranged to be detachably supported by said mounting projections and so as to press said lateral extension into abutment with said mounting; said mounting and said lateral extension including means separate from said pressing means, comprising cooperating parts on said mounting and said lateral extension respectively, so constructed and arranged that when said lamp and said mounting are in a predetermined relative rotative position said lamp is restrained against rotation with respect to said mounting.

2. In combination: a mounting having an aperture and having a plurality of circumferentiallyspaced recesses extending outwardly from said aperture; an incandescent electric lamp provided with a base having contact means; said base being disposed in said aperture and having a lateral extension provided with a plurality of circumferentially spaced radially extending projections constructed and arranged to abut said mounting; said recesses and said projections being so constructed and arranged that said projections are insertable through said recesses; said mounting having integral circumferentially spaced projections disposed around said aperture at the ends of said recesses; said mounting projections extending laterally from one side of said mounting; and means, carrying contact means cooperable with said contact means on said base, constructed and arranged to be detachably supported by said mounting projections and so as to press said lateral extension into abutment with said mounting.

HARRY A. DOUGLAS. 

